Custom XML Transformer Error

Question

I have created a custom XML Transformer using the SAP Library article:
http://help.sap.com/saphelp_nw04/helpdata/en/e1/98e14110340b7fe10000000a155106/frameset.htm
I created the project and uploaded the PAR file but when I try to create an XML iView I get to the part where I enter the URL and when I click "Next" I get the following error:
Caused by: com.sapportals.portal.prt.core.broker.PortalApplicationNotFoundException: Could not find portal application com.sap.portal.EmptyTransformersProvider...
In the PAR Structure section it says - The Par File must have the following folder structure:
dist->PORTAL-INF->portalapp.xml
dist->PORTAL-INF->xml->XSLLibrary->Transformers (My custom XSL File (stock.xsl) is HERE)
dist->PORTAL-INF->xml->Transfomers.xml
This I have completed however, it also shows two files under the project:
EmptyTransformersProvider.etz
com.sap.portal.EmptyTransformersProvider.par
What are these files and how do I create/add them? 
I noted that the name of the Project created here is EmptyTransformersProvider but my project is named ep_sts does this matter?
Also if it matters:  this is a DC which I created in NWDS using Enterprise Portal->Portal Application Module.
Lastly I have tested the XSL using Internet explorer and an XML File and it workes fine so I would assume it is not the XSL causing the error.

Answer 1

Hello
As i've created my own transform according to the tutorial, it doesnt appear in the list of available transforms either in the xml iview wizard or editor.
Any idea ?
previously I had the same error resolved by naming the project with the right name.
Thanks